For the introduction of a new kind of music must be shunned as imperiling the whole state; since styles of music are never disturbed without affecting the most important political institutions.

Plato (c. 427-347 B.C.), Greek philosopher. Socrates, in The Republic, bk. 4, sct. 424.
He continued: "It is here in music that our guardians should erect their guard-house." Adeimantus replied: "At any rate it is here that lawlessness easily creeps in unawares."